Perforating device



May 27, 1 w. H.

BEDINGHAUS 2,836,243

PERFORATING DEVICE Filed July 16, 1956 2 Sheets-Sheet 1 I INVENTOR. 5o W/u/AM h. BED/A/GHAUS j ag? W. H. BEDINGHAUS PERFORATING DEVICE May 27, 1958 Filed July 16, 1956 2 Sheets-Sheet 2 slotted, as indicated at United States Patent 1 PERFORATING DEVICE William H. Bedinghaus, Cincinnati, Ohio Application July 16, 1956, Serial No. 598,015

2 Claims. (CI. 23-65) This invention relates to a device for forming a plurality of rows of perforationsor the like in a strip or'web of paper or the like.

An object of this invention is to provide a device which makes a plurality of closely spaced parallel rows of perforations or lines of weakening in a web.

A further object of this invention is to provide a device of this type inwhich a plurality of independently swinging spring-pressed perforator wheels co-operateto steady each other against sidewise movement while-each wheel is free tomove towardor away fromthe-web underthe {urging of its spring sufliciently for proper adjustment of the pressure on each wheel.

A further object of thisinvention'is to-provide device of this type in which thepressnr'eoneachperforator wheel can be adjusted without disturbing adjnstment or other wheels. 7 a

The-above and other objects and features of this invention will be apparent tothose of ordinaryskill in'the-art to which this invention pertains, from the following detailed descriptionand thedraw-ings in whichz 1 Figure l is .a view in .end .elevationf-a device constructed in accordance with an embodiment of this in vention, the device being shown mounted on a printing press, only a fragmentary portion of the printing press being shown, the printing pressbeing shown partlyin elevation and partly in section. a 1 1 Figure :2 is a .view partly in side'elevation and partly in section of the perforating device;

Fig. 3 is a view in section taken on the line III-III in Fig. 2;

Fig. 4 is a view in section taken on the line lV-IV in Fig. 3; and

Fig. 5 is a view in side elevation of one of the swinging plates of the device and the perforator wheel associated therewith.

In the following detailed description, and the drawings, like reference characters indicate like parts.

In Fig. 1, a perforating device constructed in accordance with an embodiment of this invention is indicated generally at it The device is mounted on a rod 12. The rod 12, in turn, is mounted on a framework 13 of a printing press, only a portion of which is shown. A web of paper 14 travels along the printing press from printing rolls (not shown), under a guide roll 16, and over a back-up roll 17 to a windup roll 18. The back-up roll is parallel to and closely spaced from the rod 12 on which the perforating device is mounted. A plurality of perforator wheels 19, which form a portion of the perforating device, grip the web as it passes over the back-up roll 17 to co-operate with the back-up roll and perforate the paper of the web. As shown in Fig. 3, the edge of each perforator wheel may be provided with serrations 2 of appropriate dimensions for forming the desired perforations.

The perforating device includes end plates 21 and 22 (Fig. 2) which are heavy, rigid plates. Each end plate is 23 in Fig. 3, to provide spaced,

r 43 are shown in Figs-3 and 5. The

2,836,243 Patented May 27, 1958 2 parallel guide flanges 24 and 26. A slide member 27 of generally H-shape in section, as shown in Fig. 4, ride s between the guide flanges on each end plate (see Fig. 3). Each slide member 27 is provided with a bore 29 having a ,counterbored lower section 30 (see Fig. '2). Each H-shaped member 27 is linked to the end plate in which it is mounted by a screw 31. Each screw 31 is mounted in and threaded to a bore 32 in the upper portion of one of the end plates. The lower end of each screw carries a lug 33 having a shank which is received in the bore 29 and an enlarged lower end 34 which is received in the counterbore 30. As the screws 31 are turned, the end plates are moved up and down with respect to the rod 12. As shown, each of the end plates is substantially perpendicular to the rod 12 and to the back-up roll 17.

Each of the slide members is also provided with a threaded lower bore 34a. Thumb screws 34b mounted in the bores 34a engage the rod 12 to lock the slide members in place thereon.

The end plates 21 and 22 are bridged by rigid bars 35 and 36 which are attached to the end plates by screws 37. in addition, pivot'rods 38 and 39 and stop rods 41 and 42 span {the end plates and are parallel to the backup roll 17 and thesup'port rod 12. Each ofthe pivot rods serves as a support for a plurality of swinging plates ff- 3; {Details of"constr1 1ction of one of the swingingplates plate 43 is of inverted, 'L-shape and includesa main arm '44 and aside arm 46. A bore :47 in the side arrn'receives'the pivot rod 38;- Thearms of the plate have fiat, parallel side faces and 49. As shown in Fig. 2, each ofthe side faces of each swinging'plate engages fiatwise HgHlHS l BIfBQEIOfIilH adjacent swinging plate orof one of the end'plate s, that the plates co-operate to maintain their parallelism.

As shown in Fig. 5, the lower end of the main arrn' of each swinging plate 43jis cut away or sloted as indicated at 50, to form the shoulder 51 and a lower leg portion 52 of reduced thickness. One of the perforator wheels 19 is mounted in the slot 50. The wheel 19 is 'inounted on a stub shaft 53 which is mounted in the swinging plate and extends parallel to the pivot rods. A'bear ing 514 (Fig. 3) for the'wh eel'19 is pressed on the .stubshaft.

The wheel=19-has two'flat annular faces 56'and 57 on opposite sides thereof. The face 56 engages fiatwise against a fiat inner face 58 of lower leg portion 52. The face 57 engages a flat, outer face 59 of the adjacent swinging plate, as shown in Fig. 2. Thus, both faces of each wheel are steadied. As shown in Figs. 2 and 5, the edge of each perforator wheel is sharpened on a bevel 60 which intersects a flat face 61 on the wheel. The face 61 is parallel to faces 56 and 57 so that, when the wheel is sharpened, the spacing between the plane of the cutting edge and the faces 56 and 57 remains constant. Each of the swinging plates is pressed downwardly by a spring 62, as shown most clearly in Fig. 3. Each spring is mounted in a bore 63 in one of the rigid bores 35 and 36. An adjustment screw 64 mounted in the bore adjusts the pressure of the spring. As shown in Fig. 3, the stop bars 41 and 42 limit the extent to which the swinging plates can swing. The spring-receiving bores are directed toward the back-up roll and each of the swinging plates has a shoulder portion 66 opposed to one of the bores which the spring of said one of the bores engages.

The perforating device is mounted on the rod 12 with the edges of the perforator wheels gripping the web against the back-up roll 17. Each of the swinging plates is adjusted individually by turning the screw associated therewith to provide appropriate compression in the 7 spring thereof. Each of the swinging plates can swing in a plane perpendicular to the back-up roll but can not be cocked out of alignment. Each perforator wheel is supported on two opposite faces to prevent cocking thereof and to maintain proper alignment. As shown most clearly in Figs. 1 and 3, the perforator wheels and the supports therefor are arranged in tworows on opposite sides of the rod 12 so that any tendency of the perforating device to swing about the rod 12 is balanced. Each of the perforator wheels grips the web against the back-up roll, as shown in Fig.1." 77 a The device is shown 'with serrated perforator wheels mounted thereon, but other types of wheels for producing other types of lines of weakening, such as'score lines, or the like, may be used instead of the serrated edged wheels shown. V

The perforating device described'above and illustrated in the drawings, is subject to structural modification without departing from the spirit and scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. A device for forming a plurality of lines of weakening in a web which comprises a back-up roll, a perforator support rod adjacent, spaced from, and substantially parallel to the back-up roll, a pair of slide members posite sides of aplanc throughthe back-up roll and the V,

mounted on said perforator support rod, an end plate mounted on each slide member for sliding toward and away from the back-up roll, rneans'for holding each end plate in selected position, rigid bar members linking the 7 "end plates to hold the end plates substantially perpendicular'to the back-up roll, a pair of spaced pivot rods spanning the end plates and substantially parallel to the backup roll, a plurality of flat swinging plates pivotally mounted on each of the pivot rods between the end plates,

faces of'each swinging plate engaging fiatwise against faces of adjacent plates, a stub shaft mounted in each swinging plate spaced from the pivot thereof and substantially parallel to the pivot rods, a perforator wheel rotatably mounted on each stub shaft, each of said bar 7 members having a plurality of bores directed substantially 'toward the back-up roll, there being a bore for each swinging plate, a compression spring mounted in each of the said bores, each of said'swinging plates having a shoulder opposed to one of the bores, and spring backup means in each of said bores, thespring means urging the swinging plates to pivot in a direction to bring the perforator wheels into co-operativerrelan'on with the back: 7

up roll, the perforator; wheels being arranged in two groups gripping the web against the back-up roll on opperforator support rod. r r

2. A device for forming a plurality of lines of weakening in a web which comprises a back-up roll, a perforator support rod adjacent, spaced from, and substantially parallel to the back-up roll, a pair of slide members mounted on said perforator' support rod, an end plate mounted on each'slide member for sliding toward and away from the back-up roll, means for holding each end plate in seleoted position, rigid barmembers linking the 7 end plates to hold the end plates substantially perpendicular tothe back-up roll, a pair of spaced pivot rods spanning the end plates and substantially parallel toj the' backup roll, a plurality of -:fiat swinging plates pivotally mounted on each of the pivot rods and between the end' plates, faces of each swinging plate engaging flatwise against faces of adjacent'plates, there being a slot in the end portion of each swinging-plate, remote from the pivot thereof having an inner wall parallel to the facestof the swinging plate, a stub shaft mounted in said end portion 7 a substantially parallel to the pivot rods, a perforator' wheel rotatably mounted on each stub shaft, each perforator wheel having two oppositely facing flat annular bearing faces surrounding the stub shaft, one of said bearing faces being in flatwise engagement with the adjacenttplate, the other'of the bearingfaces being in flatwise engagement with the inner wall of the ,slot' of the swinging plate associated therewith, each of said bar members having a plurality of bores directed substantially toward the bacle up roll, there being a bore for each swinging plate,'a com pression spring mounted in each of the said bores, each of said swinging plates having a shoulder opposed to one of the bores, and spring back-up means in each of said bores, the spring means u rging the swinging plates to pivot in a direction to bring the perforator .Wheels into co-operative relation with the back-up roll.

References Cited in the file of this patent v UNITED STATES PATENTS Davidson 'Dec.i4, 1945" 

